| 1966 | 21 Mar 26 | Owyhee Off-Road Challenge | 5K/10K/13.1M/55K | Adrian, OR |
| 1967 | 07 Mar 26 | Crazy Desert Trail Race | 5K/10K/13.1M/50K/100K | San Angelo, TX |
| 1968 | 04 Apr 26 | Diablo Trails Challenge | 5K/10K/13.1M/50K | Walnut Creek, CA |
| 1969 | 02 May 26 | Run Happy 50K (and other happy distances) | 5K/10K/13.1M/50K | North Liberty, IN |
| 1970 | 04 Jan 26 | Del Dios Trail Race | 5K/10K/13.1M/50K | Escondido, CA |
| 1971 | 28 Mar 26 | Knickerbocker Canyon Trail Run | 5K/10K/13.1M/35K | Auburn, CA |
| 1972 | 21 Feb 26 | Redtail Ridge | 5K/10K/13.1M/30K/50K | Castro Valley, CA |
| 1973 | 11 Apr 26 | Martian Invasion of Races | 5K/10K/13.1M/26K/26.2M | Dearborn, MI |
| 1974 | 16 May 26 | Dances With Dirt - Gnaw Bone | 5K/10K/13.1M/26.2M/50K/100K | Nashville, IN |
| 1975 | 01 Feb 26 | The Great Frosty Forest 5K/10K/Half/Full/50K | 5K/10K/13.1M/26.2M/50K | Dumfries, VA |
| 1976 | 28 Mar 26 | Bluebonnet Trail Run | 5K/10K/13.1M/26.2M/50K | Marble Falls, TX |
| 1977 | 21 Mar 26 | Trail Trashed | 5K/10K/13.1M/26.2M/50K | Henderson, NV |
| 1978 | 02 May 26 | Sunshine Double | 5K/10K/13.1M/26.2M/50K | Winter Park, FL |
| 1979 | 07 Feb 26 | Railway Marathon & Half Marathon | 5K/10K/13.1M/26.2M/50K | Fultondale, AL |
| 1980 | 06 Jun 26 | Texoma Challenge | 5K/10K/13.1M/26.2M/50K | Denison, TX |